Edits for previously tasks and tasks for day 17-18

• Change checking on existing default comparer fot type T
• Change type of array for saving matrix
• Add saving indexes in event arguments
• Add get and set abstract methods for indexator
• Add customer exception
• Add additional methods for adding various matrixes

• Change access modificator for Node
• Add IsEmpy method
• BinarySearchTree : IEnumerable
• Change way of checking of T has default comparer
• Add version for tree

• GetEnumerator - fix return value
• Implement cycle buffer for array

• Change project structure
• Change Account
• Add AccountBase
• Relocate DTO
• Add Ninject
• Add mappers
• Add Mock

• Add old version